Work-rest for grinding-machines.



PATENTED SEPT. 27, 1904.

A. B. LANDIS.

WORK REST FOB. GRINDING MACHINES.

APPLICATION FILED THE. 12, 1906.

N0 MODEL,

a A 2 Eli Iial qmwmmoeo maiu/ TXoAuUoiT UNITED STATES Patented September 27, 1904.

PATENT OEEICE.

WORK-REST FOR GRINDING-MACHINES.

SPECIFICATION formingpart of Letters Patent No. 771,079, dated September Application flied February 12, 1904. Serial No. 193,285. (No model.)

To all whmn it may concern:

Be it known that I, ABRAHAM B. LANDIS, a citizen of the United States, residing at W aynesboro, in the county of Franklin and State of Pennsylvania, have invented certain new and useful Improvements in VVork-Rests for Grinding-Machines, of which the following is a specification.

My said invention consists in an improved construction of work-rest for grinding-machines of that general character shown in various patents heretofore gran ted to me whereby the work may be steadied and held to the grinding-wheel under a yielding pressure of the required tension, all as will be hereinafter more fully described and claimed.

Referring to the accompanying drawings, which are made a part hereof, and on which similar reference letters indicate similar parts, Figure l is a side elevation of a workrest embodying my said invention; Fig. 2, a top or plan view of the same, and Fig. 3 a detail sectional view on the dotted line 3 3 in Fig. 1.

In said drawings the portion marked A represents the bed of the machine; B, the base or supporting-frame for the work-rest; C, an arm pivoted to said base for carrying the rest proper, and D an arm pivoted to said arm C, carrying the blocks which bear against the work in use.

The bed A represents the bed-plate of a grinding-machine of any well-known construction, upon which a work-rest of this character is adapted to be used.

The base B consists of a suitable casting formed to lit upon the top of the bed A and has an extension B on its front,which projects to a point substantially beneath the normal position of the work. Said projection has a pivot-bearing the axis whereof is substantially beneath the axis of said work. On the rear side of said base is formed a projection B, having a perforation extending therethrongh at an angle in which is mounted a sleeve 6, adapted to rock upon the adjustable pivot b, for a purpose to be presently described.

The arm 0 is perforated at its front end and pivoted on a pivot 0, extending through the pivot-bearing in the front end of extension B directly beneath the work. Said arm is curved, as shown, and extends rearwardly and upwardly to a point substantially behind the work. its upper end is supported by means of a rod U", pivoted thereto at its upper end and extending downwardly through the sleeve 6 in the extension B of the base. A coiled spring ov is mounted on said rod to bear between the upper end of the sleeve Z) (or face of part B and a nut C on the upper end of said .rod, which is screw-threaded. The tension of said spring may be regulated as desired by adjusting said nut.

The arm D is pivoted to the upper end of the arm C on a pivot on directly in the rear of the work, the axis of the pivot being preferably substantially in the samehorizontal plane as the axis of the work. Said arm extends forward and upwardly, and its front end is adjustably supported upon the top of arm C by means of screw D, mounted in a screw threaded perforation in the under side of said arm D, with its outer end bearing upon the upper side of said arm C. A thumb-nut (Z' is formed or secured thereon forconveniencc in adjusting said screw. A bearing-block l) is mounted in verticai ways in the front end of said arm, as shown, being adjustably sccured by means of set-screw (1*, extending through a vertical slot in said block and into a screw-threaded perforation in the end of said arm. A similar bearing-block l) is mounted in horizontal ways on the top of said arm in the rear of the work and is similarly secured by set-screw d. Said bearing-blocks are preferably located so that they will be directly beneath and behind the axis of the work. The adjustment provided for each of said blocks and also for the arm D permits them to be brought to bear against the work, whatever the size, at the proper angle to best serve the purpose.

In use, the parts being adjusted as shown, the tension of the spring a being regulated as desired, the rest will serve to bear firmly against the work on its under side and its rear side, so as to steady it in the most advantageous manner against the operation of the grinding-wheel. The sleeve b will rock to accommodate the variation in angle of the rod C. If it is desired to hold the rest rigid for any purpose, it can be done by locking the rod C against longitudinal movement by means of the set-screw 1).

Having thus fully described my said invention, what 1 claim as new, and desire to secure by Letters Patent, is

1. A work-rest for grinding-machines comprising a base, an arm pivoted thereto beneath the work and yieldingly supported at its upper end, a second arm pivoted to said first arm at a point behind the work and adjustably supported upou'igifit arm and having bearing-block (1J6 rest-against the under and rear sides of the work, substantially as set forth.

2. A work-rest for grinding-machines comprising a base, an arm pivoted thereto beneath the work and extending to a point behind the work, means for yieldingly supporting its upper end, a second arm pivoted thereto and carrying bearing-blocks, one adapted to rest against the under side of the work and the other against the rear side of the work, substantially as set forth.

3. A work-rest for grinding-machines comprising a base, two arms pivoted together, one of which is pivoted to said base and the other of which carries bearing-blocks, and meansfor yieldingly supporting the upper ends of said arms, substantially as set forth.

4:. A work-rest for grinding-machines comprising a base, two arms pivoted together, one of which is pivoted to said base and the other of which has bearing-blocks adjustably mounted thereon, one to bear against the under side of the work and the other to bear against the rear side of the work, and a yielding support for the upper end of said arm, substantially as set forth.

5. A workrest for grinding-machines comprising a base, an arm pivoted thereto beneath the work and extending to a point behind the work, a second arm pivoted to said first arm at a point behind the work, its lower end being adjustably supported on said first arm, bearing-blocks mounted on said second arm and a yielding support for the upper end of said arm, substantially as set forth.

6. A work-rest for grinding-machines com prising a base, an arm pivoted to said base beneath the work, a rod pivoted to the upper end of said arm and extending through a bearing in the rear of said base, a coiled spring mounted between said bearing and an adjustable nut on said rod, the second arm pivoted to the first, and bearing-blocks mounted on said second arm to bear against the under and the rear sides of the work, substantially as set forth.

7. A work-rest for grinding-machines com prising a base, an arm pivoted thereon, a second arm pivoted to the first having the bearing-blocks mounted thereon, and asupport for the upper ends of said arms, substantially as set forth.

In witness whereof I have hereunto set my hand and seal at \Vaynesboro, Pennsylvania, this 28th day of January, A. D. 1904.

ABRAHAM B. LANDIS. [L. s.]

\Vitnesses:

J. E. FRANTZ, ALF. N. RUSSELL. 

